v3.26.3
Pension and Other Postretirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The following table presents the components of the PNM Plans’ net periodic benefit cost:

Three Months Ended September 30,
Pension Plan
OPEB Plan
Executive Retirement Program
202620252026202520262025
(In thousands)
Components of Net Periodic Benefit Cost
Service cost
$— $— $— $— $— $— 
Interest cost
3,822 5,385 537 567 103 121 
Expected return on plan assets
(5,608)(7,459)(1,349)(1,384)— — 
Amortization of net loss
2,593 3,124 — — 34 47 
Amortization of prior service cost
— — — — — — 
Net Periodic Benefit Cost (Income)
$807 $1,050 $(812)$(817)$137 $168 
Nine Months Ended September 30,
Pension Plan
OPEB Plan
Executive Retirement Program
202620252026202520262025
(In thousands)
Components of Net Periodic Benefit Cost
Service cost
$— $— $— $— $— $— 
Interest cost
11,466 16,154 1,611 1,700 309 365 
Expected return on plan assets
(16,825)(22,375)(4,048)(4,152)— — 
Amortization of net loss
7,779 9,371 — — 103 141 
Amortization of prior service cost
— — — — — — 
Net Periodic Benefit Cost (Income)
$2,420 $3,150 $(2,437)$(2,452)$412 $506 
The following table presents the components of the TNMP Plans’ net periodic benefit cost:

Three Months Ended September 30,
Pension Plan
OPEB Plan
2026202520262025
(In thousands)
Components of Net Periodic Benefit Cost
Service cost
$— $— $5 $4 
Interest cost
481 536 87 94 
Expected return on plan assets
(739)(733)(108)(120)
Amortization of net (gain) loss
210 168 (89)(124)
Amortization of prior service cost
— — 8 — 
Net Periodic Benefit Cost (Income)
$(48)$(29)$(97)$(146)
Nine Months Ended September 30,
Pension Plan
OPEB Plan
2026202520262025
(In thousands)
Components of Net Periodic Benefit Cost
Service cost
$— $— $14 $13 
Interest cost
1,443 1,608 261 280 
Expected return on plan assets
(2,218)(2,199)(324)(361)
Amortization of net (gain) loss
631 504 (266)(372)
Amortization of prior service cost
— — 25 — 
Net Periodic Benefit Cost (Income)
$(144)$(87)$(290)$(440)